Sludge filter press for seawater desalination

Abstract

The invention belongs to the technical field of sludge treatment equipment for seawater desalination, and particularly relates to a sludge filter press for seawater desalination, which comprises a filter pressing mechanism main body and a frame plate mounted on the filter pressing mechanism main body, the device further comprises an impact descaling mechanism, and the impact descaling mechanism cleans the frame plate through impact. By arranging the impact descaling mechanism, in the continuous filter pressing process of sludge-containing sewage, reverse impact and reverse airflow impact on a filter plate are realized by utilizing back-flushing airflow periodically provided by an impact part, so that sludge particles entering gaps of the filter plate can be discharged, the probability that the filter plate is blocked can be reduced, and in addition, the impact descaling mechanism can be matched with gravity, so that the filter plate is prevented from being blocked. According to the filter press, layer-by-layer accumulation of sludge from bottom to top is realized, so that continuous filter pressing operation is facilitated, the probability of forming a hollow mud cake is reduced, meanwhile, due to periodic impact of back-flushing airflow, a mud cake forming part is separated from a filter plate, the adhesion strength of the mud cake and the filter plate is reduced, and convenience is provided for desliming operation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sludge treatment equipment for seawater desalination, in particular to a sludge filter press for seawater desalination. BACKGROUND

[0002] Seawater desalination refers to a process of removing salt, minerals and other impurities in seawater through reverse osmosis, distillation or electrodialysis to produce fresh water that meets drinking water or industrial water standards. This technology plays a key role in alleviating water shortages, but during the treatment process, it produces salt-containing sludge that needs to be dewatered by efficient filter pressing equipment to reduce subsequent disposal costs and environmental impact.

[0003] When dewatering salt-containing sludge, direct pressure filtration is a solid-liquid separation method that does not rely on diaphragm expansion and directly compresses filter plates with a hydraulic system to maintain constant pressure. Due to its simple structure, easy maintenance and strong adaptability to raw materials, it is widely used in sludge and sewage treatment fields. However, in the field of seawater desalination, the salt-containing sludge produced by seawater desalination often contains a large amount of flocculant, making the sewage sludge jelly-like. This not only increases the moisture content of the sludge, but also makes the sludge more viscous. During positive pressure filtration, as the sewage sludge is continuously pumped into the filter chamber for filtration, the sludge eventually adheres to the filter cloth. This not only blocks the filter cloth, reducing the filtration area, but also makes it difficult for the subsequent sewage sludge to filter. Furthermore, after filtration, a large amount of sludge remains on the filter cloth, making it difficult to remove the sludge, which is not conducive to the continuous operation of the filter press.

[0004] To solve the problem of difficult sludge removal in the related art, a filter pressing type chemical wastewater treatment device and method have been disclosed, with application number CN2025105053639. This scheme adds a connecting frame, traction wheel one and traction wheel two to form a working mode similar to a track. The load rod and filter plate are lifted by the cooperation of the flip plate that flips under its own gravity, increasing the potential energy of the filter plate. After losing the obstruction of the flip plate, the filter plate collides with the horizontal plate, causing the sludge adhering to the surface to fall off. Although this scheme enhances the convenience of sludge removal after filtration, the collision and knocking method directly increases the probability of filter plate damage. Moreover, the sludge adhering to the filter cloth and filter plate is not treated in time during the filtration process, which increases the difficulty of filtration.

[0005] Therefore, the sludge filter press for seawater desalination is proposed to solve the above technical problems. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, solve the above technical problems, the present application provides a sludge filter press for seawater desalination.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the sludge filter press for seawater desalination comprises a filter press main body and a frame plate installed on the filter press main body. The filter press main body comprises a frame and a compression pumping mechanism. The compression pumping mechanism is used for compressing the frame plate and pumping sludge into the frame plate. It also comprises an impact descaling mechanism installed in the frame plate, which realizes the cleaning of the frame plate through impact. The impact descaling mechanism comprises: A filter plate and an impact piece, the frame plate is assembled by the filter plate and the impact piece, the filter plate is a plate-shaped structure with a recessed middle part, the filter plates are symmetrically distributed on both sides of the impact piece, and the impact piece periodically sprays air flow to the filter plates. A drain pipe, a drain groove is formed between the filter plate and the impact piece, a drain pipe is fixedly installed on the impact piece, and the drain pipe and the drain groove are in conductive connection. A through pipe, a through pipe is fixedly installed on the filter plate, two through pipes on the same frame plate are in sliding seal connection, adjacent two frame plates form a filter pressing groove, and the through pipes are used to connect the filter pressing grooves in series.

[0008] Preferably, the impact piece is composed of an extension pipe, a top pressing spring, an end plate and an impact pipe. The extension pipe is fixedly connected with the filter plate, the top pressing spring is used to connect both ends of the extension pipe, end plates are rotatably installed at both ends of the inner cavity of the extension pipe, the impact pipe is fixedly installed on the end plate, and the impact pipe is in contact with the filter plate when air flow is sprayed.

[0009] Preferably, the impact pipe is composed of a fixed pipe and a busbar, the fixed pipe is fixedly installed on the end plate, the fixed pipe is designed in a fan shape in cross section, the busbar is installed in the fixed pipe, the busbar is in sliding seal connection with the fixed pipe and the through pipe, and jet flow holes are evenly arranged on the busbar, the busbar is attached to the filter plate when the extension pipe is contracted, and the busbar is separated from the filter plate when the extension pipe is elongated.

[0010] Preferably, a one-way air inlet pipe is fixedly installed on the extension pipe, and a one-way plug is installed in the drain pipe.

[0011] Preferably, a moving screw is fixedly installed in the extension pipe, a transmission wheel is rotatably installed in the extension pipe, a transmission gear ring is fixedly installed on the end plate, the transmission wheel is in screw transmission with the moving screw, and the transmission wheel is in meshing with the transmission gear ring.

[0012] Preferably, a friction roller is rotatably installed on the busbar, a transmission rod is rotatably installed in the busbar, a plurality of reciprocating threads are formed in the transmission rod, a blocking plate is slidably installed on the busbar, the blocking plate is in screw transmission with the transmission rod, and the jet flow hole is located on the linear reciprocating path of the blocking plate.

[0013] Preferably, a driving shaft is rotatably installed on the frame, limiting grooves and spiral grooves are alternately arranged on the driving shaft, the filter plates are respectively extended into the limiting grooves and the spiral grooves in an initial state, a driving motor is fixedly installed on the frame, and an output end of the driving motor is fixedly connected with the driving shaft.

[0014] Preferably, a retreat groove is horizontally formed in the driving shaft, and the retreat groove is in conductive connection with the limiting grooves and the spiral grooves.

[0015] Preferably, a flow control pipe is fixedly installed on the frame, a butt joint groove is formed in the flow control pipe towards the one-way air inlet pipe side, an expansion plate is installed on the one-way air inlet pipe, the expansion plate is extended into the butt joint groove, the expansion plate is used for blocking the butt joint groove, a sealing cover and a butt joint plate are installed at the end of the butt joint pipe, a belt wheel is fixedly sleeved on the butt joint plate, the belt wheel is in belt transmission connection with the driving shaft, the sealing cover and the butt joint plate are both perforated plates, and the sealing cover and the butt joint plate are periodically aligned and in conductive connection.

[0016] Preferably, a steam pipe is installed on the frame, and the steam pipe is in detachable fixed connection with the butt joint plate.

[0017] The beneficial effects of the present application are as follows: 1. The sludge filter press for seawater desalination has the impact descaling mechanism, in the continuous pressure filtration process of the sludge-containing sewage, the reverse impact on the filter plate is realized by using the backflush airflow periodically provided by the impact piece, the reverse airflow impact can not only promote the sludge particles in the filter plate gap to be discharged, reduce the probability of the filter plate being blocked, but also cooperate with the gravity to realize the layer-by-layer accumulation of the sludge from bottom to top, thereby facilitating the continuous pressure filtration operation, reducing the probability of the formation of the hollow mud cake, and simultaneously, due to the periodic impact of the backflush airflow, the separation of the mud cake forming part from the filter plate is realized, the adhesion strength of the mud cake and the filter plate is reduced, and thereby the sludge removal operation is facilitated.

[0018] 2. The sludge filter press for seawater desalination, by setting the flow collector, the jet hole and the telescopic pipe, during the continuous operation of the filter pressing, the high pressure and low pressure environment is created by the periodic telescopic movement of the telescopic pipe, in the high pressure environment, the impact strength of the airflow on the filter plate is enhanced by reducing the airflow impact area, thereby reducing the probability of the filter plate being blocked, and in the low pressure environment, the separation of the filter plate and the flow collector promotes the uniform action of the negative pressure on the whole filter plate, thereby facilitating the creation of the pressure difference between the filter pressing tank and the drainage tank to promote the enhancement of the filter pressing effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below in combination with the drawings.

[0020] Figure 1 is a perspective view of the application; Figure 2 is a perspective view of another angle of the application; Figure 3 is a perspective view of the frame plate; Figure 4 is a split structure view of the frame plate; Figure 5 is a split structure view of the impact piece; Figure 6 is Figure 5 is a local enlarged view of A in the figure; Figure 7 is Figure 5 is a local enlarged view of B in the figure; Figure 8 is a perspective view of the driving shaft; Figure 9 is a connection structure view of the flow control pipe and the steam pipe; In the figure: 1, frame; 11, hydraulic cylinder; 12, pressing plate; 13, high pressure delivery pump; 2, filter plate; 21, drainage tank; 22, drainage pipe; 23, through pipe; 24, filter pressing tank; 25, telescopic pipe; 26, pressure spring; 27, end plate; 3, fixed pipe; 31, flow collector; 32, jet hole; 4, one-way air inlet pipe; 41, moving screw; 42, transmission wheel; 43, transmission tooth ring; 5, friction roller; 51, transmission rod; 52, blocking plate; 6, driving shaft; 61, limiting groove; 62, spiral groove; 63, driving motor; 64, retreat groove; 7, flow control pipe; 71, butt joint groove; 72, telescopic plate; 73, sealing cover; 74, butt joint plate; 75, pulley; 8, steam pipe. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application will be further described below in combination with the specific embodiments.

[0022] For example, Figures 1 to 9As shown, the sludge filter press for seawater desalination comprises a filter press body and a frame plate installed on the filter press body. The filter press body comprises a frame 1 and a compression pumping mechanism. The compression pumping mechanism is used for compressing and pumping sludge into the frame plate, and in the present application, the compression pumping mechanism at least comprises a hydraulic cylinder 11, a pressing plate 12 and a high-pressure delivery pump 13. During the compression filtration process, the hydraulic cylinder 11 fixedly installed on the frame 1 is elongated, the pressing plate 12 installed on the output end of the hydraulic cylinder 11 sequentially pushes a plurality of frame plates until the plurality of frame plates are attached to each other, and a compression filtration tank 24 is formed in the gap of the frame plate. At this time, the high-pressure delivery pump 13 is used to pump the sewage into the compression filtration tank 24 for compression filtration operation (herein as a conventional prior art, which will not be described in detail here). Further comprising an impact descaling mechanism installed in the frame plate, the impact descaling mechanism realizes cleaning of the frame plate through impact; The impact descaling mechanism comprises: The filter plate 2 and the impact piece, the frame plate is spliced by the filter plate 2 and the impact piece, the filter plate 2 is a plate-shaped structure with a recessed middle part, the filter plate 2 is symmetrically distributed on both sides of the impact piece, and the impact piece periodically sprays air flow to the filter plate 2; The drain pipe 22, the filter plate 2 and the impact piece form a drainage groove 21, the impact piece is fixedly installed with the drain pipe 22, and the drain pipe 22 and the drainage groove 21 are in conductive connection; The conductive pipe 23, the filter plate 2 is fixedly installed with the conductive pipe 23, two conductive pipes 23 on the same frame plate are in sliding sealing connection, adjacent two frame plates form a compression filtration tank 24, and the conductive pipe 23 is used for conductive connection of a plurality of compression filtration tanks 24.

[0023] In the compression filtration link of the sludge-containing sewage, in order to reduce the excessive blockage of the filter plate 2 in the compression filtration process, the impact descaling mechanism is provided in the present application, the impact descaling mechanism forms impact on the filter plate 2 in the compression filtration operation process and the sludge removal link after the compression filtration is completed, the impact direction is opposite to the filtration direction, thereby maintaining the continuous compression filtration operation, and the sludge cake formed by the compression filtration is also enhanced in the separation effect.

[0024] Specifically, when the mud-containing sewage is subjected to the pressure filtration operation, the hydraulic cylinder 11 pushes the pressing plate 12 to push the frame plates along the way until the multiple frame plates are attached to each other to form multiple pressure filtration tanks 24 arranged in sequence. At this time, the frame plate away from the pressing plate 12 is communicated with the high-pressure delivery pump 13, and the high-pressure delivery pump 13 pumps the mud-containing sewage into the communicating pipe 23 on the frame plate and then delivers it through the communicating pipe 23 and the pressure filtration tank 24. At this time, the mud-containing sewage gradually fills the pressure filtration tank 24, and under the action of water pressure, the water component in the mud-containing sewage enters the drainage tank 21 through the filter plate 2, and finally is discharged to the outside through the drainage pipe 22, while the sludge component is intercepted in the pressure filtration tank 24. With the passage of time, a mud cake is gradually formed in the pressure filtration tank 24. In this process, since the sludge enters the inside of the pressure filtration tank 24 and first accumulates on the surface of the filter plate 2, when the sludge has viscosity during the initial and middle stages of pressure filtration, it is easy to cause the phenomenon of sludge blocking the filter plate 2, which not only causes the sewage entering in the later stage of pressure filtration to be unable to be subjected to pressure filtration operation, but also causes the sludge to be difficult to separate from the filter plate 2 during the sludge removal process. In the present application, when the mud-containing sewage enters the pressure filtration tank 24 and is filtered through the filter plate 2, the sludge is intercepted on the surface of the filter plate 2. At this time, the impact member is started synchronously with the pressure filtration operation, and the impact member periodically sprays gas flow to the filter plate 2. The gas flow acts on the filter plate 2 to form a back impact on the filter plate 2, so as to make the sludge separate from the filter plate 2 and move into the pressure filtration tank 24. At the same time, under the action of gravity, the sludge has a downward movement tendency in the pressure filtration tank 24. Therefore, during the continuous pressure filtration operation, under the continuous back impact of the impact member, the sludge is gradually accumulated, which has little effect on the pressure filtration operation of the subsequent mud-containing sewage. Since the impact member continuously pumps the gas flow, the gas flow enters the pressure filtration cavity from the filter plate 2 and is finally blocked by the sludge. The impact operation of the gas flow not only reduces the adhesion strength between the accumulated sludge and the filter plate 2, but also causes the gas channel to be formed on the surface of the mud cake formed by the sludge, thereby reducing the contact area between the mud cake and the filter plate 2 and further reducing the adhesion strength between the mud cake and the filter plate 2. When the pressure filtration operation is completed, the multiple frame plates are separated from each other. At this time, under the action of gravity, the mud cake formed by the sludge finally separates from the pressure filtration tank 24.

[0025] The present application provides a back impact of the filter plate 2 by the back impact gas flow periodically provided by the impact member during the continuous pressure filtration of the mud-containing sewage. The back impact of the gas flow not only can make the sludge particles in the gap of the filter plate 2 be discharged to reduce the probability of the filter plate 2 being blocked, but also can realize the layer-by-layer accumulation of the sludge from bottom to top in cooperation with the gravity, thereby facilitating the continuous pressure filtration operation and reducing the probability of the hollow mud cake being formed. At the same time, the periodic impact of the back impact gas flow also separates the mud cake forming part from the filter plate 2 to reduce the adhesion strength between the mud cake and the filter plate 2, thereby facilitating the sludge removal operation.

[0026] As a preferred embodiment of the present application, the impact member is composed of a telescopic tube 25, a pressing spring 26, an end plate 27 and an impact tube; The telescopic tube 25 is fixedly connected with the filter plate 2, the pressing spring 26 is used for connecting both ends of the telescopic tube 25, both ends of the inner cavity of the telescopic tube 25 are rotatably installed with the end plate 27, and the impact tube is fixedly installed on the end plate 27 and in contact with the filter plate 2 when the airflow is sprayed.

[0027] The impact tube is composed of a fixed tube 3 and a bus plate 31, the fixed tube 3 is fixedly installed on the end plate 27, the cross section of the fixed tube 3 is designed in a fan shape, the inner cavity of the fixed tube 3 is slidably and sealingly installed with the bus plate 31 on the side away from the end plate 27, the bus plate 31 is provided with uniformly distributed jet flow holes 32, the bus plate 31 is attached to the filter plate 2 when the telescopic tube 25 is contracted, and the bus plate 31 is separated from the filter plate 2 when the telescopic tube 25 is elongated.

[0028] The telescopic tube 25 is fixedly installed with a one-way air inlet tube 4, and the drainage pipe 22 is installed with a one-way plug.

[0029] In the filtering process of the sewage containing mud, in order to make the air flow formed by the impact member accurately act on the filter plate 2, in the application, the filter plate 2 is symmetrically installed at both ends of the telescopic pipe 25, the telescopic pipe 25 is a tubular structure body which can be axially telescoped in length, in the embodiment, it is preferably a bellows, and the telescopic pipe 25 is provided with a top pressing spring 26 for controlling the length of the telescopic pipe 25 under the action of no pressure, and when the hydraulic cylinder 11 pushes the pressing plate 12 to apply pressure to the frame plate, according to the different pressure values, the telescopic pipe 25 and the top pressing spring 26 will be contracted in different lengths, so that during the pressure filtration operation, by controlling the periodic change of the extension length of the hydraulic cylinder 11, the pressure value between the multiple frame plates can be periodically changed, at this time, the telescopic pipe 25 performs periodic telescopic movement, when the telescopic pipe 25 is contracted in length, the space volume in the telescopic pipe 25 is reduced, the air pressure in the telescopic pipe 25 is increased, under the action of the air pressure, the air flow plate 31 is pushed to move outwardly from the fixed pipe 3, and finally the air flow plate 31 is attached to the filter plate 2, at the same time, the air enters the fixed pipe 3, the air flow plate 31 and finally is sprayed out from the jet hole 32 on the air flow plate 31, the sprayed air flow directly acts on the filter plate 2 and moves into the pressure filtration tank 24 through the pores of the filter plate 2, thereby realizing the back impact on the filter plate 2, it should be noted that, in order to reduce the probability of air flow flowing out from the gap between the air flow plate 31 and the filter plate 2, in the application, the air flow plate 31 is attached to the side of the filter plate 2 and is connected with an elastic ring layer, and the jet hole 32 is located in the inside of the elastic ring layer, thereby making the air flow sprayed from the jet hole 32 better back impact on the filter plate 2, and when the length of the telescopic pipe 25 increases, at this time, the volume in the telescopic pipe 25 increases, thereby forming negative pressure in the telescopic pipe 25, under the traction of the negative pressure, the air flow plate 31 moves towards the inside of the fixed pipe 3, thereby separating the air flow plate 31 from the filter plate 2, at the same time, the negative pressure acts on the drainage tank 21, the existence of the negative pressure further increases the pressure difference between the pressure filtration tank 24 and the drainage tank 21, thereby enhancing the pressure filtration effect, and with the continuous elongation of the telescopic pipe 25, the negative pressure strength in the telescopic pipe 25 continuously increases, when the negative pressure strength is greater than the opening pressure of the one-way air inlet pipe 4, the external air enters the telescopic pipe 25 through the one-way air inlet pipe 4, thereby providing air source for the subsequent air flow back impact.

[0030] By setting the air flow plate 31, the jet hole 32 and the telescopic pipe 25, during the continuous pressure filtration operation, the telescopic pipe 25 is periodically telescoped, thereby creating high pressure and low pressure environment, in the high pressure environment, by reducing the air flow impact area, the impact strength of the air flow on the filter plate 2 is enhanced, thereby reducing the probability of the filter plate 2 being blocked, and in the low pressure environment, by separating the filter plate 2 from the air flow plate 31, the negative pressure uniformly acts on the entire filter plate 2, thereby facilitating the creation of the pressure difference between the pressure filtration tank 24 and the drainage tank 21, so as to enhance the pressure filtration effect.

[0031] As a preferred embodiment of the present application, a moving screw 41 is fixedly installed in the telescopic tube 25, a transmission wheel 42 is rotatably installed in the telescopic tube 25, a transmission gear ring 43 is fixedly installed on the end plate 27, the transmission wheel 42 is in screw transmission with the moving screw 41, and the transmission wheel 42 is in meshing with the transmission gear ring 43.

[0032] A friction roller 5 is rotatably installed on the busbar 31, a transmission rod 51 is rotatably installed in the busbar 31, a plurality of reciprocating threads are formed on the transmission rod 51, a blocking plate 52 is slidably installed on the busbar 31, the blocking plate 52 is in screw transmission with the transmission rod 51, and the jet hole 32 is located on the linear reciprocating path of the blocking plate 52.

[0033] In order to make the back impact act periodically and with high intensity on the filter plate 2, in the present application, when the telescopic tube 25 is in telescopic movement, the moving screw 41 will be relatively displaced with the transmission wheel 42, and since the moving screw 41 is in screw transmission with the transmission wheel 42, the transmission wheel 42 will rotate during the telescopic movement of the telescopic tube 25, and since the transmission wheel 42 is in meshing with the transmission gear ring 43, the end plate 27 will be in forward and reverse rotation, and the fixed tube 3 fixedly installed on the end plate 27 will follow the end plate 27 to rotate forward and reversely, when the telescopic tube 25 is contracted, the air pressure pushes the busbar 31 to tightly adhere to the filter plate 2, and the rotation of the busbar 31 and the fixed tube 3 will cause the friction roller 5 installed on the busbar 31 to rotate, the friction roller 5 drives the transmission rod 51 to rotate, the blocking plate 52 in screw transmission with the transmission rod 51 will make linear reciprocating movement in the busbar 31, and since the jet hole 32 is located on the linear reciprocating movement path of the blocking plate 52, the existence of the blocking plate 52 will cause the jet hole 32 to be only partially opened at the same time, further reducing the air flow ejection channel, and since the periodic reciprocating movement of the blocking plate 52 is matched with the forward and reverse rotation of the fixed tube 3 and the busbar 31, the ejected air flow can act periodically and uniformly on the filter plate 2, so that the probability of clogging of the filter plate 2 under the high-intensity back impact is reduced.

[0034] As a preferred embodiment of the present application, a driving shaft 6 is rotatably installed on the frame 1, limit grooves 61 and screw grooves 62 are alternately arranged on the driving shaft 6, the filter plate 2 extends into the limit grooves 61 and the screw grooves 62 in the initial state, a driving motor 63 is fixedly installed on the frame 1, and the output end of the driving motor 63 is fixedly connected with the driving shaft 6.

[0035] A retreat groove 64 horizontally arranged is formed on the driving shaft 6, and the retreat groove 64 is in through connection with the limit grooves 61 and the push grooves.

[0036] When the pressure value of the multiple frame plates changes by the extension and retraction trend of the hydraulic cylinder 11, the multiple frame plates are not stable in sealing between them, and liquid leakage is prone to occur during the pressure change process because the multiple frame plates are different in distance from the hydraulic cylinder 11. Therefore, the driving shaft 6 is arranged on the frame 1 in the application, and the limiting groove 61, the spiral groove 62 and the retreat groove 64 are arranged on the driving shaft 6. In actual application, the retreat groove 64 is aligned with the frame plate in the initial state, and the frame plate is not hindered in the axial direction of the driving shaft 6 at this time, so as to facilitate the close fit or mutual separation of the frame plate. During the pressure filtration process, the hydraulic cylinder 11 pushes the pressing plate 12 to give stable pressure to the multiple frame plates. Under the action of the top pressure spring 26, the multiple frame plates are arranged at equal intervals, and the filter plates 2 of the adjacent two frame plates are mutually fitted. At this time, the driving shaft 6 is driven to rotate by the driving motor 63. Since the limiting groove 61 and the spiral groove 62 are communicated with the retreat groove 64, and the limiting groove 61 and the spiral groove 62 are alternately arranged, the rotation of the driving shaft 6 will make one end of the frame plate enter the limiting groove 61 and the other end enter the spiral groove 62. During the continuous rotation of the driving shaft 6, one end of the frame plate entering the limiting groove 61 remains different, and the other end entering the spiral groove 62 performs linear reciprocating motion during the continuous forward and reverse rotation of the driving shaft 6, thereby promoting the periodic extension and retraction of the frame plate, making the high-pressure back impact and the low-pressure traction alternate, and enhancing the pressure filtration operation effect.

[0037] As a preferred embodiment of the application, the frame 1 is fixedly installed with a flow control pipe 7, the flow control pipe 7 is provided with a butt joint groove 71 on the side facing the one-way air inlet pipe 4, the one-way air inlet pipe 4 is installed with an extension plate 72, the extension plate 72 extends into the butt joint groove 71, the extension plate 72 is used for plugging the butt joint groove 71, the butt joint pipe end is installed with a sealing cover 73 and a butt joint plate 74, the butt joint plate 74 is fixedly sleeved with a belt wheel 75, the belt wheel 75 is in transmission connection with the driving shaft 6, and the sealing cover 73 and the butt joint plate 74 are both perforated plates, and the sealing cover 73 and the butt joint plate 74 are periodically aligned and communicated.

[0038] The frame 1 is installed with a steam pipe 8, and the steam pipe 8 is detachably fixedly connected with the butt joint plate 74.

[0039] In order to further enhance the dredging effect of the filter plate 2 during high-pressure backwashing, a flow control pipe 7 is provided in the present application. When the hydraulic cylinder 11 pushes the pressing plate 12 and the frame plate to the position of the filter pressing operation, the telescopic pipes 25 on the one-way air inlet pipe 4 all enter the flow control pipe 7, cooperate with the pressing plate 12, and block all the openings of the flow control pipe 7. During the rotation of the driving shaft 6, the driving shaft 6 is in transmission connection with the pulley 75 on the butt plate 74, so that the butt plate 74 is periodically reversed, and the sealing cover 73 and the butt plate 74 are periodically connected, and the flow control pipe 7 is periodically connected, which can periodically supplement the steam for the flow control pipe 7. When the steam pipe 8 is directly connected with the flow control pipe 7, the flow control pipe 7 is continuously pressurized, and the one-way air inlet pipe 4 is continuously opened, which affects the negative pressure traction effect of the telescopic pipe 25 on the filter plate 2. At the same time, the steam supplied by the steam pipe 8 finally enters the telescopic pipe 25 through the one-way air inlet pipe 4, and is sprayed on the filter plate 2 when the telescopic pipe 25 is contracted, and the steam is back-impacted. On the one hand, the high temperature of the steam can dissolve the grease on the filter plate 2, enhance the cleaning effect of the filter plate 2, especially in the cleaning link after the desilting link, and in the state that the filter pressing tank 24 is empty, the telescopic pipe 25 is periodically extended and retracted, so that the pressurized impact and the decompression traction are periodically applied to the filter plate 2, and the steam can realize the rapid cleaning of the filter plate 2 on the multiple frame plates.

[0040] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A sludge filter press for seawater desalination, comprising a filter press body and a frame plate mounted on the filter press body; The filter press body includes a frame (1) and a pressing pumping mechanism; The pressing and pumping mechanism is used to press the frame plate and pump sludge into the frame plate; It also includes an impact descaling mechanism, which is installed inside the frame plate and cleans the frame plate by impact. The impact descaling mechanism includes: The filter plate (2) and the impactor are assembled by splicing the filter plate (2) and the impactor. The filter plate (2) is a plate-shaped structure with a concave center. The filter plates (2) are symmetrically distributed on both sides of the impactor. The impactor periodically sprays airflow into the filter plate (2). The drain pipe (22) forms a drain groove (21) between the filter plate (2) and the impact member. The drain pipe (22) is fixedly installed on the impact member. The drain pipe (22) is connected to the drain groove (21). The filter plates (2) are all fixedly installed with the guide pipe (23). The two guide pipes (23) on the same frame plate are slidably sealed and connected. The two adjacent frame plates form a filter press (24). The guide pipe (23) is used to connect multiple filter presses (24).

2. The sludge filter press for seawater desalination according to claim 1, characterized in that: The impact component consists of a telescopic tube (25), a top pressure spring (26), an end plate (27), and an impact tube; The telescopic tube (25) is fixedly connected to the filter plate (2). The top pressure spring (26) is used to connect the two ends of the telescopic tube (25). Both ends of the inner cavity of the telescopic tube (25) are rotatably installed with end plates (27). The impact tube is fixedly installed on the end plate (27). When the airflow is sprayed, the impact tube contacts the filter plate (2).

3. The sludge filter press for seawater desalination according to claim 2, characterized in that: The impact tube is composed of a fixed tube (3) and a manifold (31). The fixed tube (3) is fixedly installed on the end plate (27). The fixed tube (3) has a fan-shaped cross-section. The manifold (31) is installed inside the fixed tube (3). The manifold (31) is slidably sealed to the fixed tube (3) and the guide tube (23). The manifold (31) has uniformly distributed jet holes (32). When the telescopic tube (25) contracts, the manifold (31) fits against the filter plate (2). When the telescopic tube (25) extends, the manifold (31) separates from the filter plate (2).

4. The sludge filter press for seawater desalination according to claim 3, characterized in that: A one-way air inlet pipe (4) is fixedly installed on the telescopic pipe (25), and a one-way plug is installed inside the drain pipe (22).

5. The sludge filter press for seawater desalination according to claim 4, characterized in that: A movable screw (41) is fixedly installed inside the telescopic tube (25), and a transmission wheel (42) is rotatably installed inside the telescopic tube (25). A transmission gear ring (43) is fixedly installed on the end plate (27). The transmission wheel (42) and the movable screw (41) are driven by a screw, and the transmission wheel (42) meshes with the transmission gear ring (43).

6. The sludge filter press for seawater desalination according to claim 5, characterized in that: A friction roller (5) is rotatably mounted on the manifold (31), and a transmission rod (51) is rotatably mounted inside the manifold (31). The transmission rod (51) has multiple reciprocating threads. A sealing plate (52) is slidably mounted on the manifold (31). The sealing plate (52) and the transmission rod (51) are spirally driven. The jet hole (32) is located on the straight reciprocating path of the sealing plate (52).

7. The sludge filter press for seawater desalination according to claim 6, characterized in that: A drive shaft (6) is rotatably mounted on the frame (1). Alternating limit grooves (61) and spiral grooves (62) are provided on the drive shaft (6). In the initial state, the filter plate (2) extends into the limit grooves (61) and spiral grooves (62) respectively. A drive motor (63) is fixedly mounted on the frame (1). The output end of the drive motor (63) is fixedly connected to the drive shaft (6).

8. The sludge filter press for seawater desalination according to claim 7, characterized in that: The drive shaft (6) is provided with a horizontally set retraction groove (64), which is connected to the limiting groove (61) and the spiral groove (62).

9. The sludge filter press for seawater desalination according to claim 8, characterized in that: A flow control pipe (7) is fixedly installed on the frame (1). The flow control pipe (7) has a docking groove (71) on the side facing the one-way air intake pipe (4). A telescopic plate (72) is installed on the one-way air intake pipe (4). The telescopic plate (72) extends into the docking groove (71). The telescopic plate (72) is used to seal the docking groove (71). A sealing cap (73) and a docking plate (74) are installed at the end of the docking pipe. A pulley (75) is fixedly sleeved on the docking plate (74). The pulley (75) is connected to the drive shaft (6) for belt drive. Both the sealing cap (73) and the docking plate (74) are perforated plates. The sealing cap (73) and the docking plate (74) are periodically aligned and connected.

10. The sludge filter press for seawater desalination according to claim 8, characterized in that: A steam pipe (8) is installed on the frame (1), and the steam pipe (8) is detachably and fixedly connected to the docking plate (74).

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